Andy Warhol once referred to the subject of his lengthy building biopic, Empire, as an "eight-hour hard-on." If you're similarly excited by man-made structures of hubristic proportions, the Skyscraper Museum's "Supertall!" is surveying 48 international projects completed since 2001, or slated for completion within the next five years, that exceed the 1,250-foot benchmark (that's approximately 100 stories, and the height of the Empire State sans TV mast). Find out just how the world's highest Towers of Babel—most of which are sprouting up, unsurprisingly, in Asia—stay upright.